Methods of assembling joints

ABSTRACT

A method of assembling parts is provided in which a pair of interfitting surfaces adapted for press fitting are formed on the two parts, a driving force is applied to the two parts urging them axially together while a superposed vibrating force is applied to at least one of the two parts to cause the interfitting parts to engage and dipping said parts into a bath of molten metal.

Waite Antonevich States Patent [191 METHODS OF ASSEMBLING JOINTS [75] Inventor: John N. Antone vich, Jamestown,

[73] .Assignee: Blackstone Corporation, Jamestown, N.Y.

[22] Filed: July 24, 1972 [21 Appl. No.: 274,173

[52] US. Cl 29/470.1, 29/470.5, 29/503,

29/525, 228/1, 228/40 [51] Int. Cl B23k 21/00 [58] Field of Search... 29/470.1, 492, 503, 157.3 R, 29/525, 470.5; 228/1, 36, 37, 40; 113/116 [56] References Cited I UNITED STATES PATENTS 2,417,662 3/1947 Rosales 29/157.3 R 3,249,281

5/1966 St. Jean 228/1 Feb. 26, 1974 A method of assembling parts is provided in which a pair of interfitting surfaces adapted for press fitting are formed on the two parts, a driving force is applied to the two parts urging them axially together while a superposed vibrating force is applied to at least one of the two parts to cause the interfitting parts to engage and dipping said parts into a bath of molten metal.

5 Claims, 5 Drawing Figures PATENTED FEB 2 6 I974 Fig.2.

Fig.3.

Fig.l.

METHODS OF ASSEMBLING JOINTS This invention relates to method of assembling joints and particularly to a method of force fitting parts of an assembly with ultrasonic vibrations to permit subsequent dipping of assembly into molten metal for soldering of such fittings. l

The problem of assembling joints, as in the manufacture of tube assemblies, for soldering is well known and has troubled the art for many years. In conventional methods of assembling such parts it is common practice to fixture loose members in position and then with a torch to heat the joint and the solder to allow the solder to flow into the joint. Alternatively the parts surfaces to be joined are pretinned in a molten bath and then force fit the parts under heat until the tinning alloy flows into the joint. Both of these techniques require fixturing or similar means for holding the parts during the soldering operation.

I preferably provide a method of assembling joints by the steps of forming on the ends of two parts to be joined a pair of interfitting surfaces adapted for press fitting spaced from the end of the outer of said two parts, applying a driving force to the said two parts urging the interfitting surfaces together while simultaneously'superposing vibratory energy to at least one of said parts to cause the interfitting surfaces to engage and dipping said interfitting parts into a bath of molten metal. Preferably the solder bath'is ultrasonically activated while the parts are being'dipped. The superposed vibratory force may be applied to the parts being joined in any direction but is preferably applied in the direction of the driving force. 4

In the foregoing general description I have set out certain objects, purposes and advantages of my invention. Other objects, purposes and advantages of this invention' will be apparent from a consideration of the following description and the accompanying drawings in which:

FIG. 1 shows a pair of to my invention;

FIG. 2 shows a pair of parts to be joined according to a second embodiment of my invention;

FIG. 3-shows a pair of parts to be joined according to a third embodiment of my invention;

FIG. 4 shows a pair of parts to be joined according to a fourth embodiment of my invention; and

parts to be joined according FIG. 5 shows a pair of parts to be joined according to a fifth embodiment of my invention.

Referring to the drawings, I have shown an .outer part 10 and an inner part 11 to be joined. The outer part 10 is relieved at its end to form a cup-like recess 12 surrounding the exterior of part 11 into which solder may flow. A driving force, such as a hydraulic ram (not shown) is applied against the two parts 10 and 11 urging them axially together so that interfitting faces 13 and 14 engage with' the simultaneous imposition of a superposed vibratory motion on the parts being joined. The joint is finished by dipping in solder to fill the cuplike recess 12 with solder;

In the embodiment of FIG. 2, I have shown a structure similar to that of FIG. 1 with like parts bearing like numbers with the addition of the suffix a. This embodia gas pressure relief to atmosphere.

Similarly in the embodiment of FIG. 3, I have shown a structure similar to that of FIG. 1 with like parts bearment includes a notch 17 in the partll which acts as 6 ing like numbers with the'addition of suffix b. This embodiment includes a gas relief passage 18 through the sidewall of pocket recess 12b which acts as a gas pressure relief. 1

In FIG. 4 I have shown another method of providing the two interfitting surfaces. In FIG.-4 the outer part 20 is upset to form an inwardly projecting annulus 21 adapted to engage the inner part 22, leaving a recess 23 for receiving solder. Again the partsare assembled using an axial driving force with a superposed vibratory force.

FIG. 5 shows another form in which the end 30 of an inner member 31 is expanded to fit tightly into the end 32 of an outer member 33 and the two parts are forced together with an axial driving force with a superposed vibratory force.

In all cases the joint is dipped after assembly into a bath of molten metal without need for jigs or supports.

In the foregoing specification I have set out certain preferred practices and embodiments of my invention, however, it will be understood that this invention may be otherwise embodied within the scope of the following claims.

I claim:

l. A method of assembling joints comprising the steps of:

a. forming on the ends of two parts, one inner and one outer to be joined in telescoping arrangement a pair of interfitting surfaces adapted for press fitting with an open cup like recess between them;

b. applying a driving force to the said two parts urging the interfitting surfaces together while simultaneously superposing ultrasonic'ene'rgy to at least one of said parts to.cause the interfitting surfaces to engage into telescoping arrangement and to form a fitted joint; and

c. dipping said interfitted parts into a bath of molten metal to. thereby fill the resulting cup-like recess and to finished said fitted joint.

2. A method of assembling joints comprising the steps of:

a. forming on the ends of two parts to be joined a pair telescoping arrangement with a vented cup like recess between them;

' b. applying a driving force to the said two parts urging the interfitting surfaces together while simultaneously superposing vibratory energy to at least one of said parts to cause the interfitting surfaces to engage into telescoping arrangement and to form a fitted joint; and

c. dipping said interfitted parts into a bath of molten metal which isultrasonically activated to fill the resulting cup-like recess and to finished said fitted joint.

3. A method of assembling-joints comprising the steps of:

a. fon'ning on the ends of two parts to be joined a pair of interfitting surfaces adapted for press fitting spaced from the end of the outer of said two parts and to define an open cup-like recess between said P b. applying a driving force to the said two parts urging the interfitting surfaces together while simultaneously superposing ultrasonic energy to at least one of said parts to cause the interfitting surof interfitting surfaces adapted for press fitting in 3 4 faces to engage said parts into a press fitted arforce; and rangement thereby forming a fitted joint, said suc. dipping said interfitted parts into a bath of molten perposed ultrasonic force being applied to the parts m t l t th b fill th r ulti qik recess being joined in the-direction of said driving force; d to fi i h id j i and 5 5. A method of assembling joints comprising the c. dipping said interfitted parts into a bath of molten Steps metal to fill the resulting cup-like recess and to finish said joint.

4. A method of assembling joints comprising the steps of:

a. forming on the ends of two parts to be joined a pair of interfitting surfaces adapted for press fitting in telescoping arrangement with a vented cup like recess between them;

b. applying a driving force to the said two parts a. forming on the ends of two parts to be joined a pair of interfitting surfaces adapted for press fitting in telescoping arrangement, said interfitting parts forming a pocket between said parts adapted to receive solder;

b. applying a driving force to the said two parts urging the interfitting surfaces together while simultaneously superposing vibratory energy to at urging the interfitting surfaces together while sileast one of SaidPal'tS to se e nterfitting surlta l suprposing vibratory energy to at faces to engage nto telescoping arrangement and least one of said parts to cause the interfitting surf a fi f 1 and faces to engage into telescoping arrangement and pp 531d mterfitted Pf bath of molten to form a fitted joint; said superposed vibratory m a o th re y fi Sa d resulting pocket and force being applied to the parts being joined in a thereby finish said joint. direction transverse to the direction of said driving UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent 3.793.704 Dated February 26 1974 IIiVentOI(S) John N. Antonevich It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

The name of the Firm should read -Buell, Blenko & Ziesenheim--.

Column 2, Claim 1, line 41, "finished" should read -finish-.

Column 2-, Claim 2, line 55, "finished" should read --finish-.

Column 3, Claim 4, line 20, after "joint" delete the semicolon and insert a comma.

Signed and sealed this 17th day of September 1974.

(SEAL) Attest:

MCCOY M. GIBSON JR. :2. MARSHALL DANN Attesting Officer Commissioner of Patents FORM Po-1o50 (10-69) USCOMWDC 6O376- p69 U.5. GOVERNMENT PRINTING CFFICE! 126$ (Dr-365-335. 

1. A method of assembling joints comprising the steps of: a. forming on the ends of two parts, one inner and one outer to be joined in telescoping arrangement a pair of interfitting surfaces adapted for press fitting with an open cup like recess between them; b. applying a driving force to the said two parts urging the interfitting surfaces together while simultaneously superposing ultrasonic energy to at least one of said parts to cause the interfitting surfaces to engage into telescoping arrangement and to form a fitted joint; and c. dipping said interfitted parts into a bath of molten metal to thereby fill the resulting cup-like recess and to finished said fitted joint.
 2. A method of assembling joints comprising the steps of: a. forming on the ends of two parts to be joined a pair of interfitting surfaces adapted for press fitting in telescoping arrangement with a vented cup like recess between them; b. applying a driving force to the said two parts urging the interfitting surfaces together while simultaneously superposing vibratory energy to at least one of said parts to cause the interfitting surfaces to engage into telescoping arrangement and to form a fitted joint; and c. dipping said interfitted parts into a bath of molten metal which is ultrasonically activated to fill the resulting cup-like recess and to finished said fitted joint.
 3. A method of assembling joints comprising the steps of: a. forming on the ends of two parts to be joined a pair of interfitting surfaces adapted for press fitting spaced from the end of the outer of said two parts and to define an open cup-like recess between said parts; b. applying a driving force to the said two parts urging the interfitting surfaces together while simultaneously superposing ultrasonic energy to at least one of said parts to cause the interfitting surfaces to engage said parts into a press fitted arrangement thereby forming a fitted joint, said superposed ultrasonic force being applied to the parts being joined in the direction of said driving force; and c. dipping said interfitted parts into a bath of molten metal to fill the resulting cup-like recess and to finish said joint.
 4. A method of assembling joints comprising the steps of: a. forming on the ends of two parts to be joined a pair of interfitting surfaces adapted for press fitting in telescoping arrangement with a vented cup like recess between them; b. apPlying a driving force to the said two parts urging the interfitting surfaces together while simultaneously superposing vibratory energy to at least one of said parts to cause the interfitting surfaces to engage into telescoping arrangement and to form a fitted joint; said superposed vibratory force being applied to the parts being joined in a direction transverse to the direction of said driving force; and c. dipping said interfitted parts into a bath of molten metal to thereby fill the resulting cup-like recess and to finish said joint.
 5. A method of assembling joints comprising the steps of: a. forming on the ends of two parts to be joined a pair of interfitting surfaces adapted for press fitting in telescoping arrangement, said interfitting parts forming a pocket between said parts adapted to receive solder; b. applying a driving force to the said two parts urging the interfitting surfaces together while simultaneously superposing vibratory energy to at least one of said parts to cause the interfitting surfaces to engage into telescoping arrangement and to form a fitted joint; and c. dipping said interfitted parts into a bath of molten metal to thereby fill said resulting pocket and thereby finish said joint. 